Two waves of the same frequency have amplitudes 1.38 and 2.16. They interfere at a point where their phase difference is 60.0 What is the resultant amplitude? Number i UnitsIn the figure, assume two waves of light in air, of wavelength 690 nm, are initially in phase. One travels through a glass layer of index of refraction n1 = 1.69 and thickness L. The other travels through an equally thick plastic layer of index of refraction n2 = 1.28. (a) What is the smallest value L in meters should have if the waves are to end up with a phase difference of 5.92 rad? (b) If the waves arrive at some common point with the same amplitude, is their interference fully constructive, fully destructive, intermediate but closer to fully constructive, or intermediate but closer to fully destructive? N1 (a) Number i Units (b)A double-slit arrangement produces interference fringes that have an angular separation of 3.95 x 10-3 rad for light with a wavelength of ) = 420 nm. For what wavelength would the angular separation be 10.9% greater? Number i Units